In December 2017, Brewbaker was told to "cease and desist all communication" with a female victim, according to a criminal complaint. He allegedly continued to contact the victim, who had told him multiple times to stop, according to the complaint.

Brewbaker is named on the Iowa Secretary of State’s list of candidates as running for a seat in Iowa House District 43, which includes all of Windsor Heights and portions of Clive and West Des Moines.

In 2010, Brewbaker was suspended from Iowa State University for one year for repeatedly harassing a female student, according to appellate court documents.

The harassment began in 2008 when Brewbaker was a graduate assistant at the school. He was charged with third-degree harassment in district court in 2009, according to court documents.